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1. 发明申请

US20070034610A1 Shielding gas, welding method by using the same and weldment thereof 审中-公开
标题翻译：屏蔽气体，使用焊接方法和焊接方法
公开(公告)号：US20070034610A1
公开(公告)日：2007-02-15
申请号：US11501011
申请日：2006-08-09
申请人： Toshimitu Ochiai , Toyoyuki Sato , Hidetoshi Fujii , Kiyoshi Nogi , Shanping Lu
发明人： Toshimitu Ochiai , Toyoyuki Sato , Hidetoshi Fujii , Kiyoshi Nogi , Shanping Lu
IPC分类号： B23K9/167
CPC分类号： B23K9/167
摘要： The object of the present invention is to achieve a deep weld penetration in a welded portion in metal by setting appropriate conditions for welding without deteriorating the quality of welding. That is, in the present invention, the weld penetration can be made deep by using a shielding gas comprising: 0.2% by volume or more (preferably 0.4% by volume or more) of oxygen gas; and the balance being helium gas, and by further setting the other welding conditions, such that the concentration of oxygen in the welded metal in the range of 70 to 700 ppm, and the scale ratio, i.e. the value D/W, can be made large. According to the present invention, a deeper weld penetration can be achieved without deteriorating the quality of welding by adopting at least one selected from the appropriate conditions of the welding current, the welding speed, and the arc length.
摘要翻译：本发明的目的是通过设定适当的焊接条件来实现金属焊接部分的深度焊接，而不会降低焊接质量。也就是说，在本发明中，通过使用包含0.2体积％以上（优选为0.4体积％以上）的氧气的保护气体，能够使焊接贯穿深度更深; 并且余量为氦气，并且通过进一步设定其它焊接条件，使得焊接金属中的氧浓度在70至700ppm范围内，并且可以使其比例（即D / W值）大。根据本发明，通过采用选自焊接电流，焊接速度和电弧长度的适当条件中的至少一种，可以实现更深的焊接穿透，而不会使焊接质量恶化。

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